servicemultieventhandler.java

Sequoia ERP是一个真正的企业级开源ERP解决方案。它提供的模块包括：电子商务应用(e-commerce), POS系统(point of sales),知识管理,存货与仓库管理

/*
 * $Id: ServiceMultiEventHandler.java 6583 2006-01-25 20:24:44Z jonesde $
 *
 * Copyright (c) 2003-2005 The Open For Business Project - www.ofbiz.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
 * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.ofbiz.webapp.event;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import javolution.util.FastList;
import javolution.util.FastMap;

import org.ofbiz.base.util.Debug;
import org.ofbiz.base.util.UtilHttp;
import org.ofbiz.base.util.UtilProperties;
import org.ofbiz.base.util.UtilValidate;
import org.ofbiz.entity.GenericValue;
import org.ofbiz.entity.transaction.GenericTransactionException;
import org.ofbiz.entity.transaction.TransactionUtil;
import org.ofbiz.service.DispatchContext;
import org.ofbiz.service.GenericServiceException;
import org.ofbiz.service.LocalDispatcher;
import org.ofbiz.service.ModelParam;
import org.ofbiz.service.ModelService;
import org.ofbiz.service.ServiceAuthException;
import org.ofbiz.service.ServiceUtil;
import org.ofbiz.service.ServiceValidationException;

/**
 * ServiceMultiEventHandler - Event handler for running a service multiple times; for bulk forms
 *
 * @author     <a href="mailto:[e-mail]">Andy Zeneski</a>
 * @version    $Rev: 6583 $
 * @since      2.2
 */
public class ServiceMultiEventHandler implements EventHandler {

    public static final String module = ServiceMultiEventHandler.class.getName();

    public static final String SYNC = "sync";
    public static final String ASYNC = "async";

    /**
     * @see org.ofbiz.webapp.event.EventHandler#init(javax.servlet.ServletContext)
     */
    public void init(ServletContext context) throws EventHandlerException {
    }

    /**
     * @see org.ofbiz.webapp.event.EventHandler#invoke(java.lang.String, java.lang.String, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    public String invoke(String eventPath, String eventMethod, HttpServletRequest request, HttpServletResponse response) throws EventHandlerException {
        // TODO: consider changing this to use the new UtilHttp.parseMultiFormData method
        
        // make sure we have a valid reference to the Service Engine
        LocalDispatcher dispatcher = (LocalDispatcher) request.getAttribute("dispatcher");
        if (dispatcher == null) {
            throw new EventHandlerException("The local service dispatcher is null");
        }
        DispatchContext dctx = dispatcher.getDispatchContext();
        if (dctx == null) {
            throw new EventHandlerException("Dispatch context cannot be found");
        }

        // get the details for the service(s) to call
        String mode = SYNC;
        String serviceName = null;

        if (eventPath == null || eventPath.length() == 0) {
            mode = SYNC;
        } else {
            mode = eventPath;
        }

        // we only support SYNC mode in this handler
        if (mode != SYNC) {
            throw new EventHandlerException("Async mode is not supported");
        }

        // nake sure we have a defined service to call
        serviceName = eventMethod;
        if (serviceName == null) {
            throw new EventHandlerException("Service name (eventMethod) cannot be null");
        }
        if (Debug.verboseOn()) Debug.logVerbose("[Set mode/service]: " + mode + "/" + serviceName, module);

        // some needed info for when running the service
        Locale locale = UtilHttp.getLocale(request);
        HttpSession session = request.getSession();
        GenericValue userLogin = (GenericValue) session.getAttribute("userLogin");

        // get the service model to generate context(s)
        ModelService modelService = null;

        try {
            modelService = dctx.getModelService(serviceName);
        } catch (GenericServiceException e) {
            throw new EventHandlerException("Problems getting the service model", e);
        }

        if (modelService == null) {
            throw new EventHandlerException("Problems getting the service model");
        }

        if (Debug.verboseOn()) Debug.logVerbose("[Processing]: SERVICE Event", module);
        if (Debug.verboseOn()) Debug.logVerbose("[Using delegator]: " + dispatcher.getDelegator().getDelegatorName(), module);

        // check if we are using per row submit
        boolean useRowSubmit = request.getParameter("_useRowSubmit") == null ? false :
                "Y".equalsIgnoreCase(request.getParameter("_useRowSubmit"));

        // check if we are to also look in a global scope (no delimiter)
        boolean checkGlobalScope = request.getParameter("_checkGlobalScope") == null ? true :
                !"N".equalsIgnoreCase(request.getParameter("_checkGlobalScope"));

        // get the number of rows
        String rowCountField = request.getParameter("_rowCount");
        if (rowCountField == null) {
            throw new EventHandlerException("Required field _rowCount is missing");
        }

        int rowCount = 0; // parsed int value
        try {
            rowCount = Integer.parseInt(rowCountField);
        } catch (NumberFormatException e) {
            throw new EventHandlerException("Invalid value for _rowCount");
        }
        if (rowCount < 1) {
            throw new EventHandlerException("No rows to process");
        }

        // some default message settings
        String errorPrefixStr = UtilProperties.getMessage("DefaultMessages", "service.error.prefix", locale);
        String errorSuffixStr = UtilProperties.getMessage("DefaultMessages", "service.error.suffix", locale);
        String messagePrefixStr = UtilProperties.getMessage("DefaultMessages", "service.message.prefix", locale);
        String messageSuffixStr = UtilProperties.getMessage("DefaultMessages", "service.message.suffix", locale);

        // prepare the error message list
        List errorMessages = FastList.newInstance();

        // big try/finally to make sure commit or rollback are run
        boolean beganTrans = false;
        String returnString = null;
        try {
            // start the transaction
            try {
                beganTrans = TransactionUtil.begin();
            } catch (GenericTransactionException e) {
                throw new EventHandlerException("Problem starting transaction", e);
            }

            // now loop throw the rows and prepare/invoke the service for each
            for (int i = 0; i < rowCount; i++) {